Delta Electronics India, a premier provider of smart green energy and power management solutions, has successfully installed and commissioned a massive 6.4 MWh/4 MW Battery Energy Storage System (BESS) for the Kolkata Metro. Inaugurated at the Central Sub-station of the iconic Blue Line, this landmark project makes Kolkata Metro the first underground railway network in India to integrate a large-scale BESS, setting a new standard for operational reliability and energy efficiency in urban transit.
Ensuring Uninterrupted Transit and Passenger Safety
For an underground metro system, a continuous and reliable power supply is not just a matter of convenience; it is a critical safety requirement. The newly operational BESS is specifically engineered to protect the Blue Line against grid disturbances and unexpected power failures.
In the event of a sudden grid outage, the system immediately kicks in to provide emergency traction power. This ensures that passenger-carrying trains are not stranded in tunnels but can be safely and smoothly hauled to the nearest station platform.
“The deployment of our Battery Energy Storage System reflects Delta’s vision of enabling safe, resilient, and energy-efficient power solutions for critical public infrastructure across India,” stated Niranjan Nayak, Managing Director of Delta Electronics India. “We are proud to support Kolkata Metro while demonstrating how our energy storage solutions play a vital role in strengthening India’s urban transport infrastructure, especially by strengthening reliability in underground metro operations where uninterrupted power supply is essential.”
Technical Superiority: In-House Innovation
The 6.4 MWh system relies on robust Lithium Iron Phosphate (LFP) battery technology paired with high-efficiency power electronics to guarantee a rapid response during sudden electrical anomalies.
Rajesh Kaushal, Vice-President of the Energy Infrastructure Business Group at Delta Electronics India, elaborated on the system’s multifaceted capabilities: “The fully integrated BESS combines high-efficiency power electronics with Lithium Iron Phosphate battery technology to deliver rapid response during grid disturbances. In addition to emergency traction support, the system enables peak power management, power factor improvement, driving sustained operational efficiency.”
A key differentiator for Delta in this project is its end-to-end manufacturing capability. All critical components of the solution—including the Power Conditioning System (PCS), Energy Management System (EMS), and the battery racks—are designed, developed, and manufactured entirely in-house. This comprehensive control ensures superior design, quality assurance, and long-term sustainability for such a mission-critical application.
Aligning with National Sustainable Energy Goals
This installation is more than a localized upgrade; it aligns perfectly with the broader objectives of the Indian government. The project supports the Union Cabinet’s National Programme on Advanced Chemistry Cell (ACC) Battery Storage, pushing forward the nation’s goals of fortifying its energy storage infrastructure and promoting sustainable, resilient electric mobility within critical public transport systems.
By successfully executing this project, Delta Electronics India has cemented its leadership in providing safety-critical power solutions for high-density urban networks, while Kolkata Metro has established a new benchmark for transit systems nationwide.
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